12545131690 has 32 divisors (see below), whose sum is σ = 27792293760. Its totient is φ = 3970327104.

The previous prime is 12545131673. The next prime is 12545131733. The reversal of 12545131690 is 9613154521.

It is a super-2 number, since 2×12545131690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6892020 + ... + 6893839.

It is an arithmetic number, because the mean of its divisors is an integer number (868509180).

Almost surely, 2^12545131690 is an apocalyptic number.

12545131690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12545131690 is an abundant number, since it is smaller than the sum of its proper divisors (15247162070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12545131690 is a wasteful number, since it uses less digits than its factorization.

12545131690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13785886.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 12545131690 in words is "twelve billion, five hundred forty-five million, one hundred thirty-one thousand, six hundred ninety".